40320

Total 10 people and 2 have fixed place, so 8 people and number of ways = 8!=40320

There are 6 students to be seated around a circular table. In how many ways they can be seated if two particular persons are next to each other.

In how many ways the letters of the word ‘CHEKOSLOVAKIA’ can be arranged such that “SL” always comes together and ‘H’ and ‘I’ at the end places?

There are 12 different chocolates placed on a table along a straight line. In how many ways can a person choose 4 of them such that no 2 of the chosen chocolates lie next to each other?